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when 0.1 mole of ammonia is dissolved in...

when 0.1 mole of ammonia is dissolved in sufficient water to make 1 litre of solution. The solution is found to have a hydroxide ion concentration of `1.34 xx 10^(-3)` . The dissociation constant of ammonia is

A

`1.8 xx 10^(-5)`

B

`1.6 xx 10^(-6)`

C

`1.34 xx 10^(-3)`

D

`1.8 xx 10^(-4)`

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